This papercraft is Pen Pen (aka Pen²), Misato's pet, although she refers him as a member of the family, based on the Manga / Anime / Film series Neon Genesis Evangelion, the paper model created by Gankutsu-o-taku. Pen Pen is a warm-water penguin, who lives in a second freezer she keeps in her apartment. She apparently took him with her when she left her previous job.
There does not seem to be a direct real-world equivalent to the species of penguin that Pen Pen is, though the closest equivalent seems to be an Erect-crested Penguin. Pen Pen clearly possesses retractable claws, which no living bird species actually have. He also appears to have noticeably increased intelligence; watching television, reading newspapers, taking baths in hot springs, eating human food and drinking beer, and it seems to be subtly hinted that he has a near-human understanding of events around him. All of this suggests that Pen Pen is a new species, created through advanced genetic experimentation.
Through the course of the story, the existence of Pen Pen creates various comical situations, particularly in the first days of Shinji and Asuka, which are surprised to find Pen Pen taking a bath in the bathroom, just when they where about to take one. After the tremendous attack of Zeruel in Tokyo-3, Misato sadly sends Pen Pen to an animal shelter.
You can download this papercraft model here: Neon Genesis Evangelion - Pen Pen Free Papercraft Download